Abstract
In the title compound, C16H11ClN2O2, the pyrazole ring makes dihedral angles of 11.88 (13) and 22.33 (13)° with the 3-chloro-2-hydroxybenzene group and phenyl rings, respectively. The phenolic hydroxy group forms an intramolecular O—H⋯N hydrogen bond with the imine N atom of the pyrazole unit. The formyl group is virtually coplanar with the pyrazole ring [dihedral angle = 4.5 (19)°] and acts as an acceptor in an intramolecular C—H⋯O hydrogen bond closing seven-membered ring. In the crystal, adjacent molecules are linked through C—H⋯O hydrogen bonds into infinite chains along the b axis.
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